Sons of Ulster centers on a group of Irish P rotestant Nationalists w ho volunteer to fight in Europe in the bloody Battle of the Somme at the opening of World War I.

Martin helmed productions of Ulster at both the Williamstown Theatre Festival and the Huntington Theatre Company in Bos ton. Wolf, Theroux, Harne r, Fitzgerald, Walker and McLachlan starred in the Williamstown and Beantown productions. Easton starred only in the Williamstown mounting.

Easton has virtually become Lincoln Center's in-house actor. He won a Tony for his work in The Invention of Love. He is also starring in LCT's upcoming production of Henry IV.

Both Wolf and Theroux have enjoyed screen time as well as stage time. Wolf is probably best remembered as Bailey Salinger on the television drama, "Party of Five." He also has taken the stage in Side Man on Broadway and Far East and Dead End at Williamstown. Theroux was featured in David Lynch's "Mullholland Drive" and has been seen in The Three Sisters on Broadway. McGuinness is the author of Someone to Watch Over Me, which had a brief Broadway run a decade or so ago, and the adaptation of Ibsen's A Doll's House, which won a Tony Award for Best Revival.

Tickets, priced at $60, are available at the L incoln Center Theater box office (150 West 65 Street) or by calling Tele-Charge at (212) 239 6200.